Results 11 to 20 of about 14,273 (285)

Impact of Using Chevrons Nozzle on the Acoustics and Performances of a Micro Turbojet Engine

open access: yesApplied Sciences, 2021
This paper presents a study regarding the noise reduction of the turbojet engine, in particular the jet noise of a micro turbojet engine. The results of the measurement campaign are presented followed by a performances analysis which is based on the ...
Grigore Cican   +2 more
doaj   +1 more source

Advanced Control of an Electric Fuel-Oil Pump for Small Turbojet Engines

open access: yesAerospace, 2022
One way to efficiently control the fuel flow of small turbojet engines is to use direct control of the speed of a suitable electric fuel pump, as opposed to using relief valves.
Ladislav Főző, Rudolf Andoga
doaj   +1 more source

A review of studies on air-breathing turbine engines from an energy–exergy viewpoint [PDF]

open access: yesفناوری در مهندسی هوافضا, 2023
Studies show that the analysis of the first law in air propulsion systems alone is not sufficient, and for a complete study of a system, the second law and exergy analysis should also be considered.
jamasb pirkandi   +2 more
doaj   +1 more source

Effect of a Secondary Injection on the Performance of Three-Dimensional Over-under TBCC Exhaust Nozzles [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2023
A numerical simulation is used to investigate the flow field characteristics of a three-dimensional over-under turbine-based combined cycle circular-to-rectangular transition exhaust nozzle when only the turbojet flowpath is in operation.
H. Yang, Q. Yang, Z. Mu, Y. Shi, L. Chen
doaj   +1 more source

Performance Evaluation of a Turbojet Engine by Exergy Analysis of its Components [PDF]

open access: yesفناوری در مهندسی هوافضا, 2021
In this research, the performance of the J85-GE21 turbojet engine by exergy analysis of engine components was evaluated. The performance of the engine and its components for different power loads, at S.L.
Morteza Bayati
doaj   +1 more source

Experimental campaign tests on ultra micro gas turbines, fuel supply comparison and optimization [PDF]

open access: yes, 2018
The increasing demand for miniaturized radio-controlled vehicles inspired the following research. The uses of these unmanned miniaturized/micro vehicles range from aero-modeling to drones for urban control and military applications too.
Capata, Roberto, Saracchini, Matteo
core   +2 more sources

Estimating the efficiency of a bypass turbojet engine on the basis of a serial gas generator as a part of the power plant of a high-altitude unmanned aerial vehicle

open access: yesВестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2018
The article presents the results of solving the problem of defining the engineering concept of a power plant with a bypass turbojet engine based on the gas generator of the serial domestic engine TV7 117 developed by the JSC UEC-Klimov for an advanced ...
Yu. V. Zinenkov   +3 more
doaj   +1 more source

Resistant Properties of Lubricating Materials with Fullerene Nanoadditives

open access: yesПроблеми трибології, 2023
The purpose of this article is to study the possibility of using fullerene additives and their effect on the antiwear properties of aviation mineral and synthetic oils.
V.P. Oleksandrenko   +5 more
doaj   +1 more source

Robust Control of Small Turbojet Engines

open access: yesMachines, 2019
Modern turbojet engines mainly use computerized digital engine control systems. This opens the way for application of advanced algorithms aimed at increasing their operational efficiency and safety.
Rudolf Andoga   +5 more
doaj   +1 more source

Intensification of convective heat exchange of walls of heat pipe of 3D-printed micro-sized turbojet engine [PDF]

open access: yesОмский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2022
The article considers the solution of the urgent problem of creating a micro-sized turbojet engine using 3D printing. The article describes one of the ways to cool the walls of the heat pipe of a small combustion chamber made of heat-resistant material
A. V. Pobelyansky   +2 more
doaj   +1 more source

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